Added support for private jam repos

You can setup a jam private repo very easy starting from here:

http://garden20.com/market/details/jam

Which will get one started with a private couchdb repo. Further instructions are here:

https://github.com/caolan/jam/issues/53#issuecomment-10324992
details for creating private jam repo in the notes
Merge pull request #7 from ryanramage/patch-1

Added support for private jam repos